-Photo by Getty Images- Rihanna is speaking out for the first time since Chris Brown allegedly attacked her. "At the request of the authorities, Rihanna is not commenting about the incident involving Chris Brown," said the statement from her rep on Friday. "She wants to assure her fans that she remains strong, is doing well, and deeply appreciates the outpouring of support she has received during this difficult time." Today is also the singer's 21st birthday.